<script
  type="x-shader/x-vertex"
  id="vertexCropShader">
    
    // switch on high precision floats
    #ifdef GL_ES
    precision highp float;
    #endif

    varying vec2 vUv;
    
    void main()
    {
      vUv = uv;
      gl_Position = projectionMatrix * modelViewMatrix * vec4(position,1.0);
    }
    
</script>